500 ON GENERATION. 



worthy of note occurs which has not been already mentioned, 

 (more than the growth of the hair, teeth, horns, &c.) but the 

 parts only grow larger without reference to the process of gene- 

 ration, it seems unnecessary to say more upon such points at 

 present. 



I have frequently examined the conceptions of sheep during 

 the same intervals. These I find, as in the deer, extending 

 into both horns of the uterus, and presenting the figure of a 

 wallet or double sausage. In several of them I found two 

 foetuses ; in others only one : they were without a trace of 

 wool on the surface, and the eyelids were so closely glued to- 

 gether that they could not be opened; the hooves, however, 

 were present. Where there were two embryos they were con- 

 tained in the opposite horns of the uterus, and without any 

 regard to sex with reference to the right or left horn, the male 

 being sometimes in the right, sometimes in the left, and the 

 female the same ; both, however, were, in every instance, in- 

 cluded within one and the same common external membrane 

 or chorion. The extreme ends of this membrane were stained 

 on either hand with a yellow or bilious excrement, and appeared 

 to contain something turbid or excrementitious in their interior. 

 ^Many caruncles, or miniature placentas of different sizes, 

 were discovered, and otherwise disposed than in the hind 

 and doe. In the sheep they look like rounded fungi with 

 the foot-stalks broken off, and are contained in the coats 

 of the uterus; their rounded or convex aspects are turned 

 to the uterus, (a circumstance, by the way, common to the cow 

 and sheep,) their concave aspects, which are the smooth ones, 

 being turned towards the foetus. The larger branches of the 

 vessels are also distributed to the concave portion, as in the 

 human placenta. The branches in extension of the umbilical 

 vessels connected with the caruncles, grow pretty firmly into 

 them, so that when I attempted to separate them the rounded 

 portion was rather torn from the interior of the uterus than 

 from the ovum or conception ; different, consequently, from 

 what we observed in the deer, where the chorion was readily 

 detached from the cotyledons of the caruncules, and where the 

 convexity of the caruncule, connected with the conception, is 

 separable, whilst the concavity, or rather the pedicle or root, is 

 firmly adherent to the uterus. In other respects the function 



